The small seems so small and when just filled with dry kibble or even wet kibble and frozen doesn't take Javi long to get stuff out of it. I was wondering if people went up a size and what else they stuff it with. I know Karen shared on another thread what she stuffed her's with...I need to find that again. I was hoping to find some good things to stuff it with. I wish it were just a bit easier to stuff that small hole of the Kong. LOL.